So I ordered a rear wheel speed sensor for my 04 rockster from boonstra and it was wrong. Boonstra was awesome about it and refunded me, but said to not bother sending it back as the shipping made it not worth it. Great customer service. Anyways, I got the correct one from BB and now I have this one I can't use for I don't know what bike. Figured I would pass on the good deed and if anyone knows what its for and can use it, or even put in on the shelf for the future, I'd be willing to ship it to them for nothing. Here are the photos if anyone can ID it and maybe pass it on to someone who can use it.

It's the rear speed sensor for a final drive with a crown ring in it to do the inductive pickup. R1100S bikes use them and from what I'm told, so do Rocksters. However, I've seen pics of Rocksters with and without them, so I'm not sure what to think. I'm currently converting an R1150R over to something more approximating a Rockster with bags and comfort and I'm using an R1100S final drive in the process, so I can use it. Let me know and thanx for offering it up...

BadToTheBown wrote:It's the rear speed sensor for a final drive with a crown ring in it to do the inductive pickup. R1100S bikes use them and from what I'm told, so do Rocksters. However, I've seen pics of Rocksters with and without them, so I'm not sure what to think. I'm currently converting an R1150R over to something more approximating a Rockster with bags and comfort and I'm using an R1100S final drive in the process, so I can use it. Let me know and thanx for offering it up...

I had to respond ha!I have seen rocksters where the owner has had some problem with the rear drive ??leaking?? making noise?? and have replaced with (probably e bay sourced) rear drive from some other R bike like an LT or regular R..go figure what they did about the speedo!

Well I don't know if it's 100% solved, but I mailed it out this morning. You'll have to ask BadtotheBown if it works for him or not. Either way, it's gone and hopefully helping someone with their bike.

The rocksters came with the complete running gear from the S from the trans back, and the front end as well.However faced with a rear drive tear down or even a seal renew some will shop the internet (mostly ebay) and just buy a used rear drive. R bike reardrives (oilhead) will all fit the rockster and beside the S, I don't know which other one has a rear speed sensor.

I've seen them for $200 w/low miles and guaranteed to work or money back! Tearing one down and reassembly is not for the faint of heart...preload has to be right and it really requires good tools for the job.(and knowledge of such things).

Good work!It is complicated and didn't factor in the ABS as mine doesn't have it. I would not have bought it with ABS and I think the machine not having it was the reason it sat on the showroom floor for so long and I got a real good deal. (Beemer guys tend to like such gadgets, no offence intended).

As you can see I'm not of fan of the ABS (old school) as its heavy and I prefer to do my own braking. Another failure point!

I've heard and participated in ALL pros and cons around the camp fire where things tend to be a bit more civilized that on the keyboard!

I'm quite happy without.....

Off to the east today. Will be going south as there is snow forecast (burr) in Flagstaff and I have to stop in West TX on my way. Rock is loaded!!!

Well I'm off to the west today, although I'm starting in New England, so flagstaff won't be for a few weeks (if I make it that far south) . Two 04 Rocksters hitting the road at the same time. Safe and happy riding kirby

Gubachoo wrote:Well I'm off to the west today, although I'm starting in New England, so flagstaff won't be for a few weeks (if I make it that far south) . Two 04 Rocksters hitting the road at the same time. Safe and happy riding kirby

Yea I have never seen the sensor in that location, but they both seem to have one. Very curious indeed!

Thanks will be going all the way to Charleston SC and back. Party (birthday) on the Yorktown in the harbor. Could be a set of tires on this one.Cheers to you as well!!!!

I can confirm that my 2003 Rockster E80 has the speedo signal from the rear wheel only . During my recent abs/servo removal procedure I have actually removed the abs sensor ring from the front wheel - speedometer works perfectly. Very happy with the simplified braking system after a spirited ride on the first nice day of the year .

fastfil2004 wrote:I can confirm that my 2003 Rockster E80 has the speedo signal from the rear wheel only . During my recent abs/servo removal procedure I have actually removed the abs sensor ring from the front wheel - speedometer works perfectly...

... And single front wheel iABS speed sensor works when used without rear, but the original F/R signal combination for speedo input is not documented. The enterprising BMW engineer who made Integral ABS 1 such a helpful & heavy & problematic mess appears to have incorporated as many functions as possible, including the system checks for the brake switches (NC switches to measure continuity) and error checking for the Hall effect wheel speed sensors.